Piston type water hammer arrestor transition flange

Abstract

This invention relates to a piston-type water hammer transition flange, which includes a vertically arranged sealing shaft tube with an axially arranged piston cavity inside the sealing shaft tube; the flange also includes a piston body disposed within the piston cavity and a buoyancy member disposed on the lower surface of the piston body; the piston body is provided with fluid convection holes penetrating its upper and lower surfaces; the flange also includes an upper inner shaft tube and a lower inner shaft tube respectively vertically fixed to the upper and lower surfaces of the piston body, and an upper outer shaft tube and a lower outer shaft tube respectively slidably sleeved on the upper inner shaft tube and the lower inner shaft tube; a buffer channel is horizontally provided inside the piston body to connect the upper inner shaft tube and the lower inner shaft tube, and when assembled in place, the opposite ends of the upper outer shaft tube and the lower outer shaft tube both protrude out of the piston cavity; through the floating piston, the water hammer force moving into the buffer channel can be effectively absorbed, preventing the water hammer from entering the lower outer shaft tube and entering the next stage pipeline.

Description

Technical Field

[0001] This invention relates to the field of water treatment equipment technology, and in particular to a piston-type waterproof hammer transition flange. Background Technology

[0002] Water hammer occurs when, during a sudden power outage or when a valve closes too quickly, the inertia of pressurized water creates a shock wave along the length of the pipe. Because the pipe's interior is sealed, the shock wave expands both axially and radially, causing the pipe wall to feel as if it's being hammered, hence the name "water hammer." The force generated by the cyclical water hammer can sometimes be very large, damaging valves, pumps, and pipelines.

[0003] Currently, there are no connecting flanges on the market specifically designed for water hammer impact. Therefore, we have proposed a piston-type water hammer transition flange to solve the above problem. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a piston-type waterproof hammer transition flange, which can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by the present invention to solve its technical problem is as follows:

[0006] A piston-type waterproof hammer transition flange is provided. The flange includes a vertically arranged sealing shaft tube, and a piston cavity is axially provided inside the sealing shaft tube. The flange also includes a piston body disposed in the piston cavity and a buoyancy member disposed on the lower surface of the piston body. The piston body is provided with fluid convection holes penetrating its upper and lower surfaces. The flange also includes an upper inner shaft tube and a lower inner shaft tube respectively vertically fixed on the upper and lower surfaces of the piston body, and an upper outer shaft tube and a lower outer shaft tube respectively slidably sleeved on the upper inner shaft tube and the lower inner shaft tube. A buffer channel communicating with the upper inner shaft tube and the lower inner shaft tube is horizontally provided inside the piston body. When assembled, the opposite ends of the upper outer shaft tube and the lower outer shaft tube both protrude from the piston cavity.

[0007] The piston-type waterproof hammer transition flange of the present invention includes a buffer channel that is semi-circular and concentric with the piston body. The inlet and outlet of the buffer channel are parallel to the movement direction of the piston body. An impact groove is provided on the inner wall of the buffer channel at the position opposite to the inlet. The impact groove is coaxial with the upper inner shaft tube.

[0008] The piston-type water hammer transition flange of the present invention has an inlet and an outlet located at opposite ends of a diameter of the piston body, and multiple fluid convection holes are provided, all located on the side of the diameter closer to the outlet.

[0009] The piston-type waterproof hammer transition flange of the present invention includes a piston body comprising a piston base and a sealing disc detachably disposed on the upper surface of the piston base; an arc-shaped groove is concentrically disposed on the upper surface of the piston base, an upper inner shaft tube and a lower inner shaft tube are respectively disposed at both ends of the arc-shaped groove, one end of the arc-shaped groove is axially connected to the lower inner shaft tube, and the other end is provided with the impact groove; the sealing disc is provided with a through hole connecting the arc-shaped groove and the upper inner shaft tube, and the arc-shaped groove and the through hole form the buffer channel.

[0010] The piston-type waterproof hammer transition flange of the present invention includes a buoyancy member that is a disc-shaped buoyancy plate with the same diameter as the piston body, and a window on the buoyancy member corresponding to the fluid convection hole.

[0011] The piston-type waterproof hammer transition flange of the present invention comprises an upper inner shaft tube whose outer side wall is axially slidably fitted with the inner side wall of the upper outer shaft tube, and a first sealing ring provided on the outer side wall of the upper inner shaft tube; and a lower inner shaft tube whose outer side wall is axially slidably fitted with the inner side wall of the lower outer shaft tube, and a second sealing ring provided on the outer side wall of the lower inner shaft tube.

[0012] The piston-type waterproof hammer transition flange of the present invention further includes a connecting pipe connecting the piston chamber and the lower outer shaft tube, and a solenoid valve is provided on the connecting pipe.

[0013] The piston-type water hammer transition flange of the present invention further includes a first pressure sensor for detecting water pressure in the piston chamber and a second pressure sensor for detecting water pressure in the lower outer shaft tube. The flange also includes a controller. The solenoid valve, the first pressure sensor and the second pressure sensor are all electrically connected to the controller.

[0014] The piston-type waterproof hammer transition flange of the present invention is provided with flanges at the ends of the lower outer shaft tube and the upper outer shaft tube that extend out of the piston cavity.

[0015] The piston-type waterproof hammer transition flange of the present invention, wherein when assembled in place, the piston cavity is filled with a fluid medium, and the piston body floats on the upper part of the piston cavity by the buoyancy provided by the buoyancy member.

[0016] The beneficial effects of this invention are as follows: Before installation, the piston cavity is filled with a fluid medium, which can be an independent liquid or the liquid flowing in from the upper outer shaft tube. Furthermore, a buoyancy element pushes the piston body to the upper part of the piston cavity. The fluid medium, piston body, fluid medium orifice, and buoyancy element form a spring system with impact absorption function. When water hammer occurs in the pipeline and moves from the upper outer shaft tube into the piston body, the piston body moves up and down to absorb the impact force, preventing the water hammer from being transmitted to the lower outer shaft tube and entering the downstream pipeline. During the absorption of impact force, the upper and lower inner shaft tubes move up and down synchronously, ensuring the fluid in the upper outer shaft tube is continuously transmitted to the downstream pipeline. After the impact force is eliminated, the buoyancy element pushes the piston body back to the upper part of the piston cavity to prepare for the next impact. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0018] Figure 1 This is a diagram of the internal structure of the piston-type waterproof hammer transition flange of the present invention.

[0019] Figure 2 This is a top view of the piston plate of the piston-type waterproof hammer transition flange of the present invention. Detailed Implementation

[0020] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0025] The piston-type water hammer transition flange of the preferred embodiment of the present invention, such as Figure 1-2As shown, the flange includes a vertically arranged sealing shaft tube 1, with a piston chamber 2 axially arranged inside the sealing shaft tube 1; the flange also includes a piston body 3 disposed in the piston chamber 2, and a buoyancy member 4 disposed on the lower surface of the piston body 3; the piston body 3 is provided with fluid convection holes 5 penetrating its upper and lower surfaces; the flange also includes an upper inner shaft tube 6 and a lower inner shaft tube 7 respectively vertically fixed to the upper and lower surfaces of the piston body 3, and an upper outer shaft tube 8 and a lower outer shaft tube 9 respectively slidably sleeved on the upper inner shaft tube 6 and the lower inner shaft tube 7; a buffer channel 10 is horizontally provided inside the piston body 3, connecting the upper inner shaft tube 6 and the lower inner shaft tube 7. When assembled, the opposite ends of the upper outer shaft tube 8 and the lower outer shaft tube 9 both protrude from the piston chamber 2, and the upper inner shaft tube 6 and the lower inner tube are not coaxial with each other and are not coaxial with the piston body 3; before installation into the conveying pipeline, the piston chamber 2 is filled with a fluid medium. This fluid medium can be an independent liquid or the liquid flowing into the upper outer shaft tube 8. Preferably, this solution adopts the latter method to avoid fluid in the pipeline When contaminated, the piston body 3 is further lifted to the upper part of the piston cavity 2 by the buoyancy component 4. Then, the piston body 3, the fluid medium hole, and the buoyancy component 4 form a spring system with impact force absorption function. When water hammer occurs in the pipeline and the water hammer moves from the upper outer shaft tube 8 into the piston body 3, the piston body 3 moves up and down to absorb the impact force, preventing the water hammer from being transmitted to the lower outer shaft tube 9 and entering the downstream pipeline. During the process of absorbing the impact force, the upper inner shaft tube 6 and the lower inner shaft tube 7 move up and down synchronously to ensure that the fluid in the upper outer shaft tube 8 is continuously transmitted to the downstream pipeline. After the impact force is eliminated, the piston body 3 is lifted to the upper part of the piston cavity 2 again by the buoyancy component 4 to prepare for the next impact. When the water hammer enters the piston body 3, since the upper inner shaft tube 6 and the lower inner shaft tube 7 are at a 90-degree angle to the buffer channel 10, this design can make the inertial impact force of the water hammer act vertically on the piston body 3, prevent the occurrence of lateral component force, and ensure that the impact force is efficiently transmitted to the piston body 3 in the axial direction.

[0026] Preferably, the buffer channel 10 is semi-circular and concentric with the piston body 3. The inlet 1a and outlet 1b of the buffer channel 10 are parallel to the movement direction of the piston body 3. An impact groove 11 is provided on the inner wall of the buffer channel 10 at the position opposite to the inlet 1a. The impact groove 11 is coaxial with the upper inner shaft tube 6 so that when the water flows into the buffer channel 10, it is subjected to an upward jet force to offset part of the water hammer impact force.

[0027] Preferably, the inlet 1a and outlet 1b are located at both ends of one diameter of the piston body 3. Multiple fluid convection holes 5 are provided and are all located on the side of the diameter near the outlet 1b. Since the upper inner shaft tube 6 is not coaxial with the piston body 3, the impact force of the fluid entering the piston body 3 on the piston body 3 is an axial eccentric force. Therefore, the piston body 3 will be tilted due to uneven force distribution in the axial direction. By setting the fluid convection holes 5 at the end of the piston body 3 near the outlet 1b of the buffer channel 10, the lower surface of the piston body 3 has a sufficiently large contact surface with the fluid medium in the piston cavity 2 when it is subjected to impact force. The fluid medium is squeezed downward and thus subjected to an upward reaction force to offset part of the impact force of the water hammer, thereby reducing the tilt of the piston body 3.

[0028] Preferably, the piston body 3 includes a piston base 31 and a sealing disc 32 detachably disposed on the upper surface of the piston base 31; an arc-shaped groove 12 is concentrically disposed on the upper surface of the piston base 31, an upper inner shaft tube 6 and a lower inner shaft tube 7 are respectively located at both ends of the arc-shaped groove 12, one end of the arc-shaped groove 12 is connected to the lower inner shaft tube 7, the lower inner shaft tube 7 is fixedly connected to the piston base, and the other end is provided with the impact groove 11, the sealing disc is provided with a through hole connecting the arc-shaped groove 12 and the upper inner shaft tube 6, the upper inner shaft tube 6 is fixedly connected to the sealing disc 32, the arc-shaped groove 12 and the through hole form a buffer channel 10, by separating the piston body 3, the early processing and manufacturing can be facilitated.

[0029] Preferably, the buoyancy component 4 is a disc-shaped buoyancy plate with the same diameter as the piston body 3. The buoyancy of the buoyancy component 4 is greater than the sum of its own weight and the weight of the piston body 3, so as to ensure that it can automatically move upward and reset when the impact force on the piston body 3 is small. Furthermore, a window is provided on the buoyancy component 4 corresponding to the fluid convection hole to allow the fluid medium to move up and down. Furthermore, the buoyancy of the buoyancy component is set to a threshold greater than the sum of the aforementioned weights. This threshold is designed to be greater than the impact force of the strongest water hammer effect that will occur in the pipe, so as to improve adaptability. Furthermore, the buoyancy component is detachably connected to the piston body to facilitate the replacement of buoyancy components with different buoyancy, further improving the adaptability to working requirements.

[0030] Preferably, the outer side wall of the upper inner shaft tube 6 is axially slidingly fitted with the inner side wall of the upper outer shaft tube 8, and a first sealing ring 13 is provided on the outer side wall of the upper inner shaft tube 6; the outer side wall of the lower inner shaft tube 7 is axially slidingly fitted with the inner side wall of the lower outer shaft tube 9, and a second sealing ring 14 is provided on the outer side wall of the lower inner shaft tube 7, so as to balance the sealing effect and the smoothness of sliding.

[0031] Preferably, the flange also includes a connecting pipe 15 connecting the piston chamber 2 and the lower outer shaft tube 9. A solenoid valve 16 is installed on the connecting pipe 15. The solenoid valve 16 allows for rapid replenishment or filling of the piston chamber 2 with fluid medium, and also ensures that the fluid medium in the piston chamber 2 is consistent with that in the pipeline, preventing contamination.

[0032] Furthermore, this flange also includes a first pressure sensor 17 for detecting the water pressure in the piston chamber 2 and a second pressure sensor 18 for detecting the water pressure in the lower outer shaft tube 9. This flange also includes a controller (not shown in the figure), wherein the solenoid valve 16, the first pressure sensor 17 and the second pressure sensor 18 are all electrically connected to the controller. Through the controller and the first pressure sensor 17 and the second pressure sensor 18, it is possible to automatically detect whether the pressure of the fluid in the piston chamber 2 and the pipe is consistent, so as to achieve automatic pressure balance and indirectly serve as a leak detection reminder.

[0033] Preferably, both the lower outer shaft tube 9 and the upper outer shaft tube 8 are provided with flanges 19 at the ends extending out of the piston chamber 2, so as to facilitate connection with the upstream and downstream pipes.

[0034] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A piston-type waterproof hammer transition flange, characterized in that, The flange includes a vertically arranged sealing shaft tube, within which a piston chamber is axially provided; the flange also includes a piston body disposed within the piston chamber, and a buoyancy element disposed on the lower surface of the piston body; the piston body is provided with fluid convection holes penetrating its upper and lower surfaces; the flange also includes an upper inner shaft tube and a lower inner shaft tube respectively vertically fixed to the upper and lower surfaces of the piston body, and an upper outer shaft tube and a lower outer shaft tube respectively slidably sleeved on the upper inner shaft tube and the lower inner shaft tube; a buffer channel communicating with the upper inner shaft tube and the lower inner shaft tube is horizontally provided within the piston body, and when assembled in place, the opposite ends of the upper outer shaft tube and the lower outer shaft tube both protrude from the piston chamber; The buffer channel is semi-circular and concentric with the piston body. The inlet and outlet of the buffer channel are parallel to the movement direction of the piston body. An impact groove is provided on the inner wall of the buffer channel opposite the inlet. The impact groove is coaxial with the upper inner shaft tube. The inlet and the outlet are located at opposite ends of a diameter of the piston body. Multiple fluid convection holes are provided and are all located on the side of the diameter closer to the outlet. The piston body includes a piston base and a sealing disc detachably disposed on the upper surface of the piston base; an arc-shaped groove is concentrically disposed on the upper surface of the piston base, the upper inner shaft tube and the lower inner shaft tube are respectively located at the two ends of the arc-shaped groove, one end of the arc-shaped groove is connected to the lower inner shaft tube, and the other end is provided with the impact groove, the sealing disc is provided with a through hole connecting the arc-shaped groove and the upper inner shaft tube, and the arc-shaped groove and the through hole form the buffer channel.

2. The piston-type waterproof hammer transition flange according to claim 1, characterized in that, The buoyancy component is a disc-shaped buoyancy plate with the same diameter as the piston body, and a window is provided on the buoyancy component corresponding to the fluid convection hole.

3. The piston-type waterproof hammer transition flange according to claim 1, characterized in that, The outer side wall of the upper inner shaft tube is axially slidably fitted with the inner side wall of the upper outer shaft tube, and a first sealing ring is provided on the outer side wall of the upper inner shaft tube; the outer side wall of the lower inner shaft tube is axially slidably fitted with the inner side wall of the lower outer shaft tube, and a second sealing ring is provided on the outer side wall of the lower inner shaft tube.

4. The piston-type waterproof hammer transition flange according to claim 1, characterized in that, The flange also includes a connecting pipe that connects the piston chamber to the lower outer shaft tube, and a solenoid valve is provided on the connecting pipe.

5. The piston-type waterproof hammer transition flange according to claim 4, characterized in that, The flange also includes a first pressure sensor for detecting water pressure in the piston chamber and a second pressure sensor for detecting water pressure in the lower outer shaft tube. The flange also includes a controller. The solenoid valve, the first pressure sensor, and the second pressure sensor are all electrically connected to the controller.

6. The piston-type waterproof hammer transition flange according to claim 1, characterized in that, Both the lower outer shaft tube and the upper outer shaft tube have flanges at the ends extending out of the piston cavity.

7. The piston-type waterproof hammer transition flange according to any one of claims 1-6, characterized in that, When assembled, the piston chamber is filled with a fluid medium, and the piston body floats on the upper part of the piston chamber by the buoyancy provided by the buoyancy component.

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